# My Product Vs Catalog > Compares the seller's own Mercado Livre listing against the available competing listings of the same catalog product — the buy-box competition — and says where they win, lose, and what to fix first. Use it when a seller asks why they don't win the buy-box, why they don't sell despite the same product, or how they rank inside a catalog, given a Mercado Livre or JoomPulse link or a listing or catalog product identifier. It scores each parameter — price, free shipping, Full, listing type, seller reputation, official store — as Melhor, Na média, Pior, or Criticamente pior, presents reviews and rating as context, and returns a verdict, a comparison table, prioritized actions, and a spreadsheet. Triggers include "why don't I win the buy-box" and the pt-BR "por que não ganho o buy-box". Mercado Livre (Brasil) only; sales and revenue are JoomPulse estimates, not real transactions. For a product and its competitors, use the single-product analysis skill; for one over time, the change-monitor skill. - Skill: `joomcode/my-product-vs-catalog` (Agent Skill) - Install (CLI): `npx skillmds@latest add joomcode/my-product-vs-catalog` - Raw SKILL.md: https://api.skillmd.com/api/skills/joomcode/my-product-vs-catalog/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Data & Analytics - Author: joomcode (https://skillmd.com/u/joomcode) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/joomcode/my-product-vs-catalog --- # Mercado Livre — My Product vs. Catalog (Buy-Box Competitiveness) This skill compares the seller's **own** Mercado Livre (Brasil) listing against **the available competing listings of the same catalog product** — the sellers competing for the same buy-box — and tells the seller, in pt-BR, where they win, where they lose, and **what to fix first** to win the buy-box and convert more. Given a product by a Mercado Livre link, a JoomPulse link, a Mercado Livre listing identifier, or a catalog product identifier, it identifies the seller's listing and the catalog it belongs to, gathers the available competing listings, and produces a short verdict, a comparison table, a prioritized list of improvements, and a downloadable spreadsheet. The comparison covers the available competing listings; when a large catalog is sampled, it says so. This is different from the sibling skills. To size up a single product and find the products that compete with it, use the single-product analysis skill. To track how one product moves over time, use the change-monitor skill. **This** skill answers "how do I stack up against the other sellers of the exact same product, and what should I change to win?" ## Prerequisites - JoomPulse MCP access is configured for the current agent environment. - The seller provides their product as a Mercado Livre link, a JoomPulse link, a Mercado Livre listing identifier, or a catalog product identifier. - The available JoomPulse tools can look up a listing's current market data, the set of competing listings for the same catalog product, and the buy-box winner's attributes. If JoomPulse MCP access is unavailable, stop and explain that the skill requires JoomPulse MCP setup before it can compare a listing against its catalog. ## Scope - **Mercado Livre (Brasil) only.** JoomPulse also covers Shopee Brasil, but **Shopee has no catalogue and no buy-box** — an item belongs to one shop, so there is no set of rival offers on the same product to be measured against and no buy-box to win. This analysis therefore exists only for Mercado Livre; never apply its logic or its verdict wording to a Shopee item. - **It compares within one catalog product.** The comparison is the seller versus the other sellers of the same catalog product (the same buy-box), not a search for similar products. - **Sales and revenue are JoomPulse estimates** derived from historical listing data — not real transactions. Disclose this in every output. Price, rating, review count, logistics, and seller attributes are real Mercado Livre data — say so, it is a strength of the report. - **Read-only.** The skill does not sign in as the seller or modify any listing. - **Language:** detect the seller's language and respond in it. Default to pt-BR. - **Keep the workflow invisible.** The seller wants the answer, not a play-by-play. If one lookup returns nothing, switch approaches quietly; only if everything fails do you say one short, friendly sentence. ## How It Works 1. **Identify the product.** Resolve the link or identifier to the seller's listing and the catalog product it belongs to. If the input is a catalog product (rather than a single listing), ask the seller which listing is theirs, since the whole point is to compare *their* listing against the rest. The catalog product is the key that groups competing sellers. 2. **Gather the catalog.** Collect every active competing listing for that catalog product, plus the buy-box winner's attributes and the catalog's overall totals, so there is a clear "catalog leader" to benchmark against. 3. **Compare and classify.** For each parameter, compare the seller's value to the catalog median, the best/cheapest competitor, and the buy-box winner, and label it (see Status levels below). 4. **Prioritize.** Sort the gaps by how much they cost: buy-box and conversion levers first, quick wins ahead of slow ones — which naturally yields the order price → logistics → reputation. ## Parameters Compared - **Price** — versus the catalog median, the cheapest competitor, and the buy-box price. - **Free shipping (frete grátis)** — whether the seller offers it and how common it is among competitors and the buy-box winner. - **Mercado Envios Full** — same, since Full strongly influences exposure and the buy-box. - **Listing type** — Premium / Clássico / Grátis tier, versus the catalog. - **Reviews and rating** — on catalog products these are usually shared across all sellers of the same product, so they are generally not comparable between competitors. Present them as context, not as a scored Melhor/Pior dimension, instead of treating a shared number as an advantage. - **Seller reputation and medal** — versus the buy-box winner and the catalog. - **Official store** — whether the seller or the buy-box winner is an official store (shown when relevant). ## Status Levels Each parameter gets one status, with a colour marker so it reads at a glance: - 🟢 **Melhor** — better than most of the catalog; keep it. - 🟡 **Na média** — on par with the catalog, i.e. level with most sellers (not merely an arithmetic average). - 🟠 **Pior** — clearly behind the catalog. - 🔴 **Criticamente pior** — behind on a buy-box or conversion lever (price, free shipping, Full) where the gap is large — this is what most directly costs the sale. - **—** — not compared (no data available, or a catalog-shared metric like reviews). ## Output Respond in pt-BR, leading with the verdict: 1. **Veredito** — two to four sentences: where the seller wins, where they lose, their buy-box position, and the single top priority. 2. **Comparison table** — one row per parameter: `Parâmetro`, `Meu produto`, `Catálogo / Concorrentes`, `Status`, `O que fazer`. 3. **Improvement priorities** — a numbered list, ordered by impact: what matters most for competitiveness first, then quick wins, then the long-term levers. 4. **Competitors (optional)** — a short table of competing listings, cheapest first, flagging the buy-box winner. 5. **Disclaimer** — include the bilingual estimate notice below. 6. **Downloads** — offer the comparison as a downloadable spreadsheet. **Disclaimer (every report):** > ⚠️ Sales and revenue are JoomPulse **estimates** based on historical listing > data — they are **not** actual transactions. Price, rating, reviews, logistics, > and seller data are real Mercado Livre data. / Vendas e receita são > **estimativas** do JoomPulse com base no histórico de anúncios — **não são > transações reais**. Preço, classificação, avaliações, logística e dados do > vendedor são dados reais do Mercado Livre. ## Edge Cases - **The item is on Shopee, not Mercado Livre:** say plainly that Shopee has no catalogue and no buy-box, so there is no rival-offer set on the same product to compare against — the question cannot be answered there, and Mercado Livre logic must not be borrowed. Offer the nearest real alternative: how the item compares with others in its Shopee category on price, rating and reviews, labelled as a public-market comparison rather than a buy-box verdict. If the marketplace is unclear, ask first — an identifier beginning `MLB` is Mercado Livre, a bare 10–11 digit number is Shopee. - **The input is a catalog product, not a single listing:** ask which listing is the seller's before comparing. - **The product is not part of a catalog:** there is no shared buy-box to compete in; say so and offer the single-product analysis skill instead. - **The seller is the only seller:** there is nothing to compare — report the buy-box status and say they are currently alone on this product. - **A very large catalog:** when there are more competitors than can be fetched at once, the medians and shares are based on a sample — say so — while the buy-box leader's attributes remain exact. - **A listing is not tracked by JoomPulse:** the index covers products with sales; say it isn't tracked and offer to try another listing or link. - **A parameter has no data:** show it as "dado indisponível" rather than dropping it, so the seller can see every parameter was checked.